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A153951
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Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 6 ones in any 5 X 5 X 5 subtriangle.
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0
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1, 2, 4, 16, 48, 181, 930, 8275, 75027, 1115868, 15698357, 385413794, 9296853593, 385316885091, 15604629751554, 1064622004776402
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OFFSET
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0,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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